Resonant superbanana and resonant banana losses of injected fast ions in Heliotron E and Wendelstein VII-A: effects of the radial electric field
Resonant superbanana and resonant banana losses of injected fast ions in Heliotron E and Wendelstein VII-A: effects of the radial electric field
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Heliotron E 和 Wendelstein VII-A 中注入快离子的共振超级香蕉和共振香蕉损失：径向电场的影响
DOI：
10.1088/0029-5515/32/10/i06
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发表时间：
1992
期刊：
影响因子：
3.3
通讯作者：
F. Penningsfeld
中科院分区：
文献类型：
--
作者：
K. Hanatani;F. Penningsfeld
采用蒙特卡罗束离子热化程序，研究了非轴对称环形器件中径向电场Er在高能囚禁粒子约束中的作用。在温德尔斯坦VII-A（Max-Planck-Institut fur Plasmaphysik，Garching）和Heliotron E（京都大学）中进行了比较研究，以解释用垂直中性束注入实现的有效加热。重新进入的快离子的Er场的存在下，检查与粒子的损失边界上的多个假设。蒙特卡罗模拟表明，一个向内的Er场提高了W VII-A的加热效率，但往往恶化它在Heliotron E。这种差异被解释为两个不同分支的E × B漂移共振诱导的快离子损失区。在W VII-A中的有效加热是由E × B共振引起的共振香蕉轨道的捕获边界向相反一侧移动来解释的。Heliotron E中快离子损失的增加是由E × B漂移和螺旋囚禁离子的极向漂移之间发生的共振所解释的。然而，当真空容器壁用作边界时，所产生的谐振超香蕉损耗被发现是小的。离子再进入对离子加热速率和电荷交换损失的影响也被澄清。得出的结论是，在Heliotron E实验中观察到的有效加热仅与考虑快离子再进入的Monte Carlo模拟相兼容
The role of the radial electric field Er in energetic trapped particle confinement was investigated in nonaxisymmetric toroidal devices with orbit following Monte Carlo beam ion thermalization codes. A comparative study was performed in Wendelstein VII-A (Max-Planck-Institut fur Plasmaphysik, Garching) and in Heliotron E (Kyoto University) to explain the efficient heating achieved with perpendicular neutral beam injection. Re-entering of fast ions was examined in the presence of the Er field with multiple assumptions on the loss boundary of particles. Monte Carlo simulations showed that an inward Er field improves the heating efficiency in W VII-A but tends to deteriorate it in Heliotron E. This difference was interpreted in terms of fast ion loss regions induced by two different branches of the E × B drift resonance. The efficient heating in W VII-A was explained by a counter-side shift of the trapping boundary of resonant banana orbits due to the E × B resonance. The increased fast ion loss in Heliotron E was explained by the resonance occurring between the E × B drift and the poloidal drift of helically trapped ions. However, the resulting resonant superbanana loss was found to be small when the vacuum vessel wall was used as the boundary. The effects of re-entering of ions on the ion heating rate and the charge exchange loss were also clarified. It is concluded that the efficient heating observed in Heliotron E experiments is compatible only with Monte Carlo simulations that take re-entering of fast ions into account
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox